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Expired Canadian patentCanada

High pore volume alumina from dilute high injection alkoxide feed

CA 1107939 A · Owner: Continental Oil Company · Inventors: Scamehorn, John F.; Stowell, Donald E.; Bendig, Larry L.

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Abstract From the Canadian patent

An improved method for increasing alumina pore volumes said alumina being produced by the hydrolysis of aluminum alkoxides, the improvement comprising diluting the aluminum alkoxide, prior to entering the hydrolysis reactor with an, alkanol containing from 2 to 8 carbon atoms and injecting the dilute solution into the reactor at high velocities.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 30, 1979
GrantedSeptember 1, 1981
Term endedSeptember 1, 1998
Patent numberCA 1107939 A
Classification (IPC)C01F7/02 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedApril 30, 1979Patent grantedSep 1, 1981Term endedSep 1, 1998

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.